2
2.0
audio
eye 2
favorite 0
comment 0
Topic: music, jam, ninjam
2
2.0
audio
eye 2
favorite 0
comment 0
Topic: music, jam, ninjam
2
2.0
audio
eye 2
favorite 0
comment 0
Topic: music, jam, ninjam
2
2.0
Nov 12, 2017
11/17
by
catelican ángela
texts
eye 2
favorite 0
comment 0
descripción de microorganismos
Topic: microorganismos
3
3.0
audio
eye 3
favorite 0
comment 0
Topic: music, jam, ninjam
1
1.0
audio
eye 1
favorite 0
comment 0
Topic: music, jam, ninjam
0
0.0
web
eye 0
favorite 0
comment 0
benningtontech dumped with WikiTeam tools.
Topics: wiki, wikiteam, wikispaces, benningtontech, benningtontech, benningtontech.wikispaces.com
1
1.0
Oct 18, 2018
10/18
by
David Jones 大卫 琼斯
movies
eye 1
favorite 0
comment 0
port of tel aviv, middle east, slow motion, wave, splash, drops, water, wet, menacing, menace, dog, labrador, woman, soaking, pour, wet, water, beach, mediterranean, ocean, high tide, Source: https://www.flickr.com/photos/46258685@N00/20570263521 Uploader: David Jones 大卫 琼斯
Topics: Flickr, video
1
1.0
Nov 23, 2018
11/18
by
Rousseau, Mariette
texts
eye 1
favorite 0
comment 0
Fa parte della corrispondenza ricevuta da Pier Andrea Saccardo e conservata presso la Biblioteca dell'Orto Botanico dell'Università di Padova.
Topics: Orto botanico di Padova, carteggio, botanica, lettere, corrispondenza, Padua botanical garden,...
1
1.0
Nov 23, 2018
11/18
by
Rousseau, Mariette
texts
eye 1
favorite 0
comment 0
Fa parte della corrispondenza ricevuta da Pier Andrea Saccardo e conservata presso la Biblioteca dell'Orto Botanico dell'Università di Padova.
Topics: botanica, P.A. Saccardo, lettere, epistolario, letters, Orto botanico di Padova, carteggio,...
0
0.0
Oct 16, 2018
10/18
by
Peter Breuls
movies
eye 0
favorite 0
comment 0
Font Màgica, de magische fontein, aan de Avinguda de Maria Cristina. Source: https://www.flickr.com/photos/56562542@N00/2947810870 Uploader: Peter Breuls
Topics: Flickr, video, barcelona, espana, spain, spanje
1
1.0
Jun 29, 2018
06/18
by
Lei Wang
texts
eye 1
favorite 0
comment 0
This is one of a series papers which aim towards to solve the problem of determining automorphism groups of Frobenius groups. This one solves the problem in the case where the Frobenius kernels are elementary abelian and Frobenius complements are cyclic.
Topics: Group Theory, Mathematics
Source: http://arxiv.org/abs/1610.05914
1
1.0
Jun 30, 2018
06/18
by
Robin A. A. Ince
texts
eye 1
favorite 0
comment 0
Obtaining meaningful quantitative descriptions of the statistical dependence within multivariate systems is a difficult open problem. Recently, the Partial Information Decomposition (PID) was proposed to decompose mutual information (MI) about a target variable into components which are redundant, unique and synergistic within different subsets of predictor variables. Here, we propose to apply the elegant formalism of the PID to multivariate entropy, resulting in a Partial Entropy Decomposition...
Topics: Neurons and Cognition, Quantitative Methods, Statistics Theory, Computing Research Repository,...
Source: http://arxiv.org/abs/1702.01591
1
1.0
Jun 30, 2018
06/18
by
Thanh Dat Le; Van Hop Nguyen
texts
eye 1
favorite 0
comment 0
We address the issue of improving the quality of the joint remote preparation of an arbitrary two-qubit in case four qubits of the quantum channel which consists of a GHZ state and a GHZ-like one are subjected to noises. Two controlling parameters are added, one in the quantum channel and other in the measurement of the second sender, in order to optimize the averaged fidelities. The results from analyzing the behaviors of the optimal averaged fidelities show that there are essentially two...
Topic: Quantum Physics
Source: http://arxiv.org/abs/1703.04976
1
1.0
Jun 29, 2018
06/18
by
L. Suárez-Andrés; G. Israelian; J. I. González Hernández; V. Zh. Adibekyan; E. Delgado Mena; N. C. Santos; S. G. Sousa
texts
eye 1
favorite 0
comment 0
Context. Carbon, oxygen and nitrogen (CNO) are key elements in stellar formation and evolution, and their abundances should also have a significant impact on planetary formation and evolution. Aims. We present a detailed spectroscopic analysis of 1110 solar-type stars, 143 of which are known to have planetary companions. We have determined the carbon abundances of these stars and investigate a possible connection between C and the presence of planetary companions. Methods. We used the HARPS...
Topics: Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1611.10092
1
1.0
Jun 30, 2018
06/18
by
Mirsad Cosovic; Dejan Vukobratovic
texts
eye 1
favorite 0
comment 0
We present a detailed study of the applications of factor graphs and the belief propagation (BP) algorithm to the state estimation (SE) problem. Our methodology starts with the BP solution for the linearized DC model, and use insights obtained therein to derive the BP algorithm for the non-linear AC model. Then, we make a key further step, where we present the solution in which the BP is applied sequentially over the AC model, akin to what is done by the Gauss-Newton method. The resulting...
Topics: Optimization and Control, Information Theory, Computing Research Repository, Mathematics
Source: http://arxiv.org/abs/1702.05781
2
2.0
Jun 30, 2018
06/18
by
Miguel A. Fortuna; Raul Ortega; Jordi Bascompte
texts
eye 2
favorite 0
comment 0
The Web of Life (www.web-of-life.es) provides a graphical user interface, based on Google Maps, for easily visualizing and downloading data on ecological networks of species interactions. It is designed and implemented in a relational database management system, allowing sophisticated and user-friendly searching across networks. Users can access the database by any web browser using a variety of operating systems. Data can be downloaded in several common formats, and a data transmission...
Topics: Populations and Evolution, Quantitative Biology
Source: http://arxiv.org/abs/1403.2575
1
1.0
Jun 30, 2018
06/18
by
Maria Vlasiou
texts
eye 1
favorite 0
comment 0
We review the theory of renewal reward processes, which describes renewal processes that have some cost or reward associated with each cycle. We present a new simplified proof of the renewal reward theorem that mimics the proof of the elementary renewal theorem and avoids the technicalities in the proof that is presented in most textbooks. Moreover, we mention briefly the extension of the theory to partial rewards, where it is assumed that rewards are not accrued only at renewal epochs but also...
Topics: Probability, Mathematics
Source: http://arxiv.org/abs/1404.5601
1
1.0
Jun 30, 2018
06/18
by
Xinru Cao
texts
eye 1
favorite 0
comment 0
In this paper, the fully parabolic Keller-Segel system \begin{equation} \left\{ \begin{array}{llc} u_t=\Delta u-\nabla\cdot(u\nabla v), &(x,t)\in \Omega\times (0,T),\\ v_t=\Delta v-v+u, &(x,t)\in\Omega\times (0,T),\\ \end{array} \right. \qquad \qquad (\star) \end{equation} is considered under Neumann boundary conditions in a bounded domain $\Omega\subset\mathbb{R}^n$ with smooth boundary, where $n\ge 2$. We derive a smallness condition on the initial data in optimal Lebesgue spaces...
Topics: Mathematics, Analysis of PDEs
Source: http://arxiv.org/abs/1405.6666
2
2.0
Jun 30, 2018
06/18
by
Asiri Nanayakkara; Thilagarajah Mathanaranjan
texts
eye 2
favorite 0
comment 0
Anderson $\textit{et al}$ have shown that for complex energies, the classical trajectories of $\textit{real}$ quartic potentials are closed and periodic only on a discrete set of eigencurves. Moreover, recently it was revealed that, when time is complex $t$ $(t=t_{r}e^{i\theta _{\tau }}),$ certain real hermitian systems possess close periodic trajectories only for a discrete set of values of $\theta _{\tau }$. On the other hand it is generally true that even for real energies, classical...
Topics: Mathematics, Mathematical Physics
Source: http://arxiv.org/abs/1406.5867
3
3.0
Jun 30, 2018
06/18
by
Adrien Devresse; Fabrizio Furano
texts
eye 3
favorite 0
comment 0
Remote data access for data analysis in high performance computing is commonly done with specialized data access protocols and storage systems. These protocols are highly optimized for high throughput on very large datasets, multi-streams, high availability, low latency and efficient parallel I/O. The purpose of this paper is to describe how we have adapted a generic protocol, the Hyper Text Transport Protocol (HTTP) to make it a competitive alternative for high performance I/O and data...
Topics: Distributed, Parallel, and Cluster Computing, Performance, Computing Research Repository
Source: http://arxiv.org/abs/1410.4168
1
1.0
Jun 30, 2018
06/18
by
Ognyan Christov; Georgi Georgiev
texts
eye 1
favorite 0
comment 0
In this paper we study the equation $$ w^{(4)} = 5 w" (w^2 - w') + 5 w (w')^2 - w^5 + (\lambda z + \alpha)w + \gamma, $$ which is one of the higher-order Painlev\'e equations (i.e., equations in the polynomial class having the Painlev\'e property). Like the classical Painlev\'e equations, this equation admits a Hamiltonian formulation, B\"acklund transformations and families of rational and special functions. We prove that this equation considered as a Hamiltonian system with...
Topics: Nonlinear Sciences, Exactly Solvable and Integrable Systems
Source: http://arxiv.org/abs/1412.2867
9
9.0
Jun 26, 2018
06/18
by
Hinrich Arnoldt; Steven H. Strogatz; Marc Timme
texts
eye 9
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comment 0
It has been hypothesized that in the era just before the last universal common ancestor emerged, life on earth was fundamentally collective. Ancient life forms shared their genetic material freely through massive horizontal gene transfer (HGT). At a certain point, however, life made a transition to the modern era of individuality and vertical descent. Here we present a minimal model for this hypothesized "Darwinian transition." The model suggests that HGT-dominated dynamics may have...
Topics: Biological Physics, Quantitative Biology, Nonlinear Sciences, Condensed Matter, Adaptation and...
Source: http://arxiv.org/abs/1501.05073
4
4.0
Jun 26, 2018
06/18
by
Fani Petalidou
texts
eye 4
favorite 0
comment 0
We consider the problem of the symplectic realization of a Poisson-Nijenhuis manifold. By applying a new technique developed by M. Crainic and I. Marcut for the study of the above problem in the case of a Poisson manifold, we establish the existence, under a condition, of a nondegenerate Poisson-Nijenhuis structure on an open neighborhood of the zero-section of the cotangent bundle of the manifold, which symplectizes the initial structure. Additionally, we present some examples.
Topics: Differential Geometry, Mathematics
Source: http://arxiv.org/abs/1501.07830
6
6.0
Jun 27, 2018
06/18
by
R. J. Li; X. Lin; S. S. Lin; X. Liu; H. S. Chen
texts
eye 6
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comment 0
In this Letter, we theoretically propose for the first time that graphene monolayers can be used for superscatterer designs. We show that the scattering cross section of the bare deep-subwavelength dielectric cylinder is markedly enhanced by six orders of magnitude due to the excitation of the first-order resonance of graphene plamons. By utilizing the tunability of the plasmonic resonance through tuning graphene's chemical potential, the graphene superscatterer works in a wide range of...
Topics: Condensed Matter, Optics, Physics, Materials Science
Source: http://arxiv.org/abs/1503.04094
4
4.0
Jun 27, 2018
06/18
by
Xiangru Li; Q. M. Jonathan Wu; Ali Luo; Yongheng Zhao; Yu Lu; Fang Zuo; Tan Yang; Yongjun Wang
texts
eye 4
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comment 0
Large-scale and deep sky survey missions are rapidly collecting a large amount of stellar spectra, which necessitate the estimation of atmospheric parameters directly from spectra and makes it feasible to statistically investigate latent principles in a large dataset. We present a technique for estimating parameters $T_{eff}$, log$~g$ and [Fe/H] from stellar spectra. With this technique, we first extract features from stellar spectra using the LASSO algorithm; then, the parameters are estimated...
Topics: Solar and Stellar Astrophysics, Instrumentation and Methods for Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1504.02558
6
6.0
Jun 27, 2018
06/18
by
Zhen Pan; Cong Yu
texts
eye 6
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comment 0
Blandford-Znajek (BZ) mechanism describes a process extracting rotation energy from a spinning black hole (BH) via magnetic field lines penetrating the event horizon of central BH. In this paper, we present a perturbation approach to study force-free jets launched by the BZ mechanism, and its two immediate applications: (1) we present a high-order split monopole perturbation solution to the BZ mechanism, which accurately pins down the energy extraction rate $\dot E$ and well describes the...
Topics: General Relativity and Quantum Cosmology, High Energy Astrophysical Phenomena, Astrophysics
Source: http://arxiv.org/abs/1504.04864
6
6.0
Jun 27, 2018
06/18
by
Cameron Smith; Ximo Pechuan; Raymond S. Puzio; Daniel Biro; Aviv Bergman
texts
eye 6
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comment 0
Constraints placed upon the phenotypes of organisms result from their interactions with the environment. Over evolutionary timescales, these constraints feed back onto smaller molecular subnetworks comprising the organism. The evolution of biological networks is studied by considering a network of a few nodes embedded in a larger context. Taking into account this fact that any network under study is actually embedded in a larger context, we define network architecture, not on the basis of...
Topics: Populations and Evolution, Molecular Networks, Quantitative Biology, Quantitative Methods
Source: http://arxiv.org/abs/1506.02749
1
1.0
Jun 28, 2018
06/18
by
Uǧis Lācis; Kunihiko Taira; Shervin Bagheri
texts
eye 1
favorite 0
comment 0
Dispersion of low-density rigid particles with complex geometries is ubiquitous in both natural and industrial environments. We show that while explicit methods for coupling the incompressible Navier-Stokes equations and Newton's equations of motion are often sufficient to solve for the motion of cylindrical particles with low density ratios, for more complex particles - such as a body with a protrusion - they become unstable. We present an implicit formulation of the coupling between rigid...
Topics: Fluid Dynamics, Computational Physics, Physics
Source: http://arxiv.org/abs/1510.04806
1
1.0
Jun 28, 2018
06/18
by
Nguyen Quang-Hung; Nam Thoai
texts
eye 1
favorite 0
comment 0
This paper investigates the energy-aware virtual machine (VM) allocation problems in clouds along characteristics: multiple resources, fixed interval time and non-preemption of virtual machines. Many previous works have been proposed to use a minimum number of physical machines, however, this is not necessarily a good solution to minimize total energy consumption in the VM placement with multiple resources, fixed interval time and non-preemption. We observed that minimizing the sum of total...
Topics: Performance, Computing Research Repository, Distributed, Parallel, and Cluster Computing
Source: http://arxiv.org/abs/1511.07423
1
1.0
Jun 29, 2018
06/18
by
Kyle B Gustafson; Basil S. Bayati; Philip A. Eckhoff
texts
eye 1
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comment 0
From footpaths to flight routes, human mobility networks facilitate the spread of communicable diseases. Control and elimination efforts depend on characterizing these networks in terms of connections and flux rates of individuals between contact nodes. In some cases, transport can be parameterized with gravity-type models or approximated by a diffusive random walk. As a alternative, we have isolated intranational commercial air traffic as a case study for the utility of non-diffusive,...
Topics: Quantitative Biology, Physics and Society, Physics, Populations and Evolution
Source: http://arxiv.org/abs/1601.07655
1
1.0
Jun 29, 2018
06/18
by
S. V. Prants; A. G. Andreev; M. V. Budyansky; M. Yu. Uleysky
texts
eye 1
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comment 0
The seasonal and interannual variability of mesoscale circulation along the eastern coast of the Sakhalin Island in the Okhotsk Sea is investigated using AVISO velocity field and oceanographic data for the period from 1993 to 2016. It is found that mesoscale cyclones with the horizontal dimension of about 100 km occur there predominantly during summer, whereas anticyclones occur predominantly during fall and winter. The cyclones are generated due to the coastal upwelling forced by northward...
Topics: Atmospheric and Oceanic Physics, Physics
Source: http://arxiv.org/abs/1610.08187
1
1.0
Jun 29, 2018
06/18
by
Xiaolong Yang; Jesús Carrete; Zhao Wang
texts
eye 1
favorite 0
comment 0
We calculate the thermal conductivity of PbTe and PbS with seven different types of nanoprecipitates using an ab-initio-based Boltzmann transport approach. We find that precipitates with realistic size distributions can reduce the thermal conductivity well below the predictions of theoretical models assuming a single precipitate size.We explore the question of how to tune this distribution to reduce the thermal conductivity even further. The predicted minimum value is strongly correlated with...
Topics: Materials Science, Condensed Matter
Source: http://arxiv.org/abs/1611.00901
1
1.0
Jun 29, 2018
06/18
by
Hana Gil; Panagiota Papakonstantinou; Chang Ho Hyun; Tae-Sun Park; Yongseok Oh
texts
eye 1
favorite 0
comment 0
The density functional theory (DFT) is based on the existence and uniqueness of a universal functional $E[\rho]$, which determines the dependence of the total energy on single-particle density distributions. However, DFT says nothing about the form of the functional. Our strategy is to first look at what we know, from independent considerations, about the analytical density dependence of the energy of nuclear matter and then, for practical applications, to obtain an appropriate...
Topic: Nuclear Theory
Source: http://arxiv.org/abs/1611.04257
2
2.0
Jun 29, 2018
06/18
by
Alex Rice
texts
eye 2
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comment 0
We show that if $h\in \mathbb{Z}[x]$ is a polynomial of degree $k \geq 2$ such that $h(\mathbb{N})$ contains a multiple of $q$ for every $q\in \mathbb{N}$, known as an $\textit{intersective polynomial}$, then any subset of $\{1,2,\dots,N\}$ with no nonzero differences of the form $h(n)$ for $n\in\mathbb{N}$ has density at most a constant depending on $h$ times $(\log N)^{-c\log\log\log\log N}$, where $c=(2\log k)^{-1}$. Bounds of this type were previously known only for monomials and...
Topics: Number Theory, Classical Analysis and ODEs, Combinatorics, Mathematics
Source: http://arxiv.org/abs/1612.01760
2
2.0
Jun 29, 2018
06/18
by
Marcel Sheeny de Moraes; Sankha Mukherjee; Neil M Robertson
texts
eye 2
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comment 0
Human interaction recognition is a challenging problem in computer vision and has been researched over the years due to its important applications. With the development of deep models for the human pose estimation problem, this work aims to verify the effectiveness of using the human pose in order to recognize the human interaction in monocular videos. This paper developed a method based on 5 steps: detect each person in the scene, track them, retrieve the human pose, extract features based on...
Topics: Computer Vision and Pattern Recognition, Computing Research Repository
Source: http://arxiv.org/abs/1612.03982
1
1.0
Jun 30, 2018
06/18
by
Koji Maruyama; Daniel Burgarth
texts
eye 1
favorite 0
comment 0
Towards the full-fledged quantum computing, what do we need? Obviously, the first thing we need is a (many-body) quantum system, which is reasonably isolated from its environment in order to reduce the unwanted effect of noise, and the second might be a good technique to fully control it. Although we would also need a well-designed quantum code for information processing for fault-tolerant computation, from a physical point of view, the primary requisites are a system and a full control for it....
Topic: Quantum Physics
Source: http://arxiv.org/abs/1701.00216
3
3.0
Jun 30, 2018
06/18
by
Denys Khusainov; Michael Pokojovy; Elvin Azizbayov
texts
eye 3
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comment 0
We prove an exact controllability result for a one-dimensional heat equation with delay in both lower and highest order terms and nonhomogeneous Dirichlet boundary conditions. Moreover, we give an explicit representation of the control function steering the system into a given final state. Under certain decay properties for corresponding Fourier coefficients which can be interpreted as a sufficiently high Sobolev regularity of the data, both control function and the solution are proved to be...
Topics: Mathematics, Optimization and Control
Source: http://arxiv.org/abs/1401.5664
2
2.0
Jun 30, 2018
06/18
by
David Li-Bland; Alan Weinstein
texts
eye 2
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comment 0
A construction of Wehrheim and Woodward circumvents the problem that compositions of smooth canonical relations are not always smooth, building a category suitable for functorial quantization. To apply their construction to more examples, we introduce a notion of highly selective category, in which only certain morphisms and certain pairs of these morphisms are "good". We then apply this notion to the category $\mathbf{SLREL}$ of linear canonical relations and the result ${\rm...
Topics: Symplectic Geometry, Mathematics, Category Theory
Source: http://arxiv.org/abs/1401.7302
2
2.0
Jun 30, 2018
06/18
by
K. Atazadeh; Y. Heydarzade; F. Darabi
texts
eye 2
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comment 0
The stability of Einstein static universe against homogeneous scalar perturbations in the context of braneworld scenario is investigated. The stability regions are obtained in terms of the constant geometric linear equation of state parameter $\omega_{extr}=p_{extr}/\rho_{extr}$ and are studied for each evolutionary era of the universe. The results are discussed for the case of closed, open or flat universe in each era under the obtained restricting conditions. We also briefly investigate the...
Topics: High Energy Physics - Theory, General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1401.7638
3
3.0
Jun 30, 2018
06/18
by
Javad Laali; Mohammad Fozouni
texts
eye 3
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comment 0
Let $A$ be a Banach algebra and $X$ be a Banach $A$-bimodule. We introduce and study the notions of $n$-multipliers and approximate local $n$-multipliers by generalizing the classical concept of multipliers from $A$ into $X$. As an algebraic result, we construct a Banach algebra consisting of $n$-multipliers on $A$ and under some mild conditions, we give a nice relation of this algebra with $n$-homomorphisms from $A$ into $\mathbb{C}$.
Topics: Functional Analysis, Mathematics
Source: http://arxiv.org/abs/1403.4016
1
1.0
Jun 30, 2018
06/18
by
Xiaohui Liu; Karl Mosler; Pavlo Mozharovskyi
texts
eye 1
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comment 0
Given data in $\mathbb{R}^{p}$, a Tukey $\tau$-trimmed region is the set of all points that have at least Tukey depth $\tau$ in the data. As they are visual, affine equivariant and robust, Tukey trimmed regions are useful tools in nonparametric multivariate analysis. While these regions are easily defined and can be interpreted as $p$-variate quantiles, their practical application is impeded by the lack of efficient computational procedures in dimension $p>2$. We construct two algorithms...
Topics: Computation, Statistics
Source: http://arxiv.org/abs/1412.5122
33
33
Jun 27, 2018
06/18
by
Alok Ranjan; H. B. Sahu; Prasant Misra
texts
eye 33
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Wireless sensor network (WSN) has attracted researchers worldwide to explore the research opportunities, with application mainly in health monitoring, industry automation, battlefields, home automation and environmental monitoring. A WSN is highly resource constrained in terms of energy, computation and memory. WSNs deployment ranges from the normal working environment up to hostile and hazardous environment such as in volcano monitoring and underground mines. These characteristics of WSNs hold...
Topics: Operating Systems, Computing Research Repository
Source: http://arxiv.org/abs/1505.05269
9
9.0
Jun 28, 2018
06/18
by
Valerii Garnaga
texts
eye 9
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comment 0
The article describes a new data structure called neuro-index. It is an alternative to well-known file indexes. The neuro-index is fundamentally different because it stores weight coefficients in neural network. It is not a reference type like "keyword-position in a file".
Topics: Computing Research Repository, Information Retrieval
Source: http://arxiv.org/abs/1509.01649
2
2.0
Jun 30, 2018
06/18
by
Ghislain Fourier; David Hernandez
texts
eye 2
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comment 0
In this note, inspired by the proof of the Kirillov-Reshetikhin conjecture, we consider tensor products of Kirillov-Reshetikhin modules of a fixed node and various level. We fix a positive integer and attach to each of its partitions such a tensor product. We show that there exists an embedding of the tensor products, with respect to the classical structure, along with the reverse dominance relation on the set of partitions.
Topics: Mathematics, Quantum Algebra, Representation Theory
Source: http://arxiv.org/abs/1403.4750
2
2.0
Jun 30, 2018
06/18
by
Lilian Weng; Filippo Menczer; Yong-Yeol Ahn
texts
eye 2
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comment 0
We investigate the predictability of successful memes using their early spreading patterns in the underlying social networks. We propose and analyze a comprehensive set of features and develop an accurate model to predict future popularity of a meme given its early spreading patterns. Our paper provides the first comprehensive comparison of existing predictive frameworks. We categorize our features into three groups: influence of early adopters, community concentration, and characteristics of...
Topics: Physics, Data Analysis, Statistics and Probability, Computers and Society, Computing Research...
Source: http://arxiv.org/abs/1403.6199
5
5.0
Jun 30, 2018
06/18
by
Andrzej Borowiec; Anna Pachol
texts
eye 5
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We extend our previous study of Hopf-algebraic $\kappa$-deformations of all inhomogeneous orthogonal Lie algebras ${\rm iso}(g)$ as written in a tensorial and unified form. Such deformations are determined by a vector $\tau$ which for Lorentzian signature can be taken time-, light- or space-like. We focus on some mathematical aspects related to this subject. Firstly, we describe real forms with connection to the metric's signatures and their compatibility with the reality condition for the...
Topics: High Energy Physics - Theory, Mathematics, Quantum Algebra, Mathematical Physics
Source: http://arxiv.org/abs/1404.2916
1
1.0
Jun 30, 2018
06/18
by
Bert Schroer
texts
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comment 0
Modular localization is the concise conceptual formulation of causal localization in the setting of local quantum physics. Unlike QM it does not refer to individual operators but rather to ensembles of observables which share the same localization region, as a result it explains the probabilistic aspects of QFT in terms of the impure KMS nature arising from the local restriction of the pure vacuum. Whereas it played no important role in the perturbation theory of low spin particles, it becomes...
Topics: High Energy Physics - Theory, Mathematics, Mathematical Physics
Source: http://arxiv.org/abs/1407.2124
1
1.0
Jun 30, 2018
06/18
by
Luis Sanabria-Russo; Jaume Barcelo; Boris Bellalta; Francesco Gringoli
texts
eye 1
favorite 0
comment 0
Collisions are a main cause of throughput degradation in WLANs. The current contention mechanism used in IEEE 802.11 networks is called Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA). It uses a Binary Exponential Backoff (BEB) technique to randomise each contender attempt of transmitting, effectively reducing the collision probability. Nevertheless, CSMA/CA relies on a random backoff that while effective and fully decentralised, in principle is unable to completely eliminate...
Topics: Networking and Internet Architecture, Computing Research Repository
Source: http://arxiv.org/abs/1412.1395
6
6.0
Jun 27, 2018
06/18
by
Jun Ma
texts
eye 6
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In this paper, we present the properties of 10 halo globular clusters with luminosities $L\simeq 5-7\times 10^5{L_\odot}$ in the Local Group galaxy M33 using the images of {\it Hubble Space Telescope} Wide Field Planetary Camera 2 in the F555W and F814W bands. We obtained ellipticities, position angles and surface brightness profiles for them. In general, the ellipticities of M33 sample clusters are similar to those of M31 clusters. The structural and dynamical parameters are derived by fitting...
Topics: Astrophysics of Galaxies, Astrophysics
Source: http://arxiv.org/abs/1503.02655
